7 Clinical Trials for Various Conditions
Reactive arthritis, also known as Reiter's syndrome, is a form of arthritis that occurs as a reaction to an infection elsewhere in the body. It is characterized by inflammation of the joints, tendons, urogenital tract, and eyes. Pain and swelling in the knees, ankles, and feet are common. This study will determine the effectiveness of antibiotic therapy in treating people with chlamydia-induced reactive arthritis that has lasted for more than 6 months.
This study will evaluate patients with inflammatory forms of arthritis within the first year of onset. The study will attempt to clarify factors that may predict disease course such as evolution into rheumatoid arthritis (RA) or other chronic inflammatory arthropathies. Synovial biopsies and synovial fluid will be obtained to search for microbial agents and other initiating and modulating factors that may be most readily distinguished early in the disease and to determine the stage of disease at which certain immunologic and hormonal changes become evident. The study will also search for genetic and other features that may be associated with specific forms of inflammatory arthropathies that might predict the subsequent clinical disease course or response to different agents used in treatment of RA, Reiter's syndrome and other types of chronic inflammatory arthropathies.
Post-acute sequelae of SARS-CoV-2 infection can cause multiple system function disorders, and complicated symptoms last for an extended period. The virus can cause this continued infection, or the virus causes immune system function disorder and post-infectious autoimmune disease. The clinical symptoms can be smell loss, taste loss to liver function disorder, kidney function failure, different. No matter how complicated the systems showed in the clinic, all of the symptoms are due to the specific cells being damaged. Our clinical study is focused on recovering the damaged structure and function of the cells that could restore the organ function back to normal or close to normal
This study learn how easily patients can use an educational tool that will be created for patients with melanoma and pre-existing autoimmune diseases who receive or will receive immune checkpoint inhibitor drugs. Patients will be asked their opinions about the design, accessibility, and content of the tool. Researchers will use the information collected to improve the educational materials that will help patients make future decisions about their treatment.
To facilitate clinical, basic science, and translational research projects involving the study of rheumatic diseases.
The purpose of this study is to develop evidence on the relative efficacy of 2 rifaximin chemoprophylaxis regimens for the prevention of Travelers' Diarrhea (TD) in a deployed setting. An additional purpose is to explore the effect of chemoprophylaxis on microbial flora and antimicrobial resistance, and obtain parameter estimates to inform a cost-effectiveness model of chemoprophylaxis in prevention of TD. Information from this study will be used to develop management guidelines for the prevention of TD among deployed (United States (US) and United Kingdom (UK) military personnel. The study will be a multi-site, randomized, placebo-controlled, double-blind, clinical trial among deployed military personnel. The study will test 2 TD chemoprophylaxis regimens (once daily versus twice daily) of the same antibiotic, rifaximin, compared to a placebo. For the proposed chemoprophylaxis study described herein, cohorts of military personnel (US and UK) deploying/traveling overseas will be recruited prior to travel to participate and will undergo enrollment procedures as outlined in study appendices. Subjects who are eligible and agree to participate will be randomized to receive one of 3 regimens: (1) rifaximin 550 mg daily; (2) rifaximin 550 mg twice a day; or (3) placebo, to be taken while deployed. Chemoprophylaxis will be maintained for duration of travel or a predetermined period of up to 6 weeks and at least 2 weeks, which may include a period of up to 5 days of use after return to COO for deployments less than 6 weeks in duration. Clinical and laboratory data will be obtained before, during if available and after deployment/chemoprophylaxis.
This study will evaluate the 2-5 year outcome of a cohort of 250 patients with early synovitis, who were recruited into protocol 94-AR-0194 (The Pathogenesis of Inflammatory Synovitis: A Study of Early Arthritis). Clinical, radiographic, and functional outcome parameters, particularly those relating to articular damage and functional loss, will be evaluated and related back to clinical, serologic, immunogenetic, and pathologic variables identified at the onset of the arthropathy. A model will be generated which incorporates and weighs the variables in order to determine diagnostic and prognostic markers in the early stages of arthritis. Synovial tissue samples have been obtained from the entire cohort at the initial visit of protocol 94-AR-0194. Studies of these biopsies have so far demonstrated evidence for the presence of infectious agents in a proportion of the samples, and have generated information regarding the cytokine profiles in the early stages of synovitis. In an attempt to further define the pathogenetic mechanisms of synovitis longitudinally, biopsies will be repeated on selected subsets of the cohort. Specific questions to be answered relate to the persistence of microbial agents in the synovium, and to the evolution of cellular and molecular mechanisms which mediate the invasive, destructive potential of the synovial lesion. It is anticipated that these studies should prove valuable to clinicians who are attempting to stratify patients for therapeutic strategies, early in their disease course. They should also prove valuable in enhancing the understanding of the pathogenetic mechanisms of synovitis.